These are big brands. Logitech Pure-Fi with remote and power cable, has radio; Bass and Treble option. JBL spyro is a Computer speaker that can be used to play music using Phone; DVD player and also for Dstv etc. And Yamaha Pdx-30 with power cable is strictly for iPod. All of these speakers can be bought separately or as a combo. The combo R1480........(1). Logitech with remote and power cable R6 ...